your health. when we visited the special management unit at the maricopa county jail in phoenix, arizona, we were struck by how different it felt from the rest of the facility. >> this is where the killers, rapists, the most violent offenders are housed. and when you get up there, it has a very different feel than other areas of the jail, and that's because there's an eerie silence. and the reason there's an eerie silence, as opposed to other segregation units, is because the inmates are housed behind double sets of doors. this is as close to a hannibal lechter cell environment as you can get. they don't even leave for recreation. they just open one of the interior sliding doors and they walk out and they have their 45